/* Round float to integer away from zero.
   Copyright (C) 1997-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include "libm.h"

float roundf(float x)
{
	int32_t i0, j0;
	GET_FLOAT_WORD(i0, x);
	j0 = ((i0 >> 23) & 0xff) - 0x7f;
	if (j0 < 23) {
		if (j0 < 0) {
			i0 &= 0x80000000;
			if (j0 == -1)
				i0 |= 0x3f800000;
		} else {
			uint32_t i = 0x007fffff >> j0;
			if ((i0 & i) == 0)
				/* X is integral.  */
				return x;
			i0 += 0x00400000 >> j0;
			i0 &= ~i;
		}
	} else {
		if (j0 == 0x80)
			/* Inf or NaN.  */
			return x + x;
		else
			return x;
	}
	SET_FLOAT_WORD(x, i0);
	return x;
}
